Locally there was one that sold for $1500-$1600, I'm not seeing $4000 for a JP either.
You point at Ebay when you are trying to sucker someone in that they are getting a deal. Its like trying to justify the price tag of the rotting hulk you have for sale based on what stuff is selling for at a Barrett-Jackson car auction.
Ebay is used for global advertising, the real cash trades hands behind the scenes.
You know how many pins I have seen "sold" on ebay for some ridiculous price.... and it shows up for sale again week after week.. at the same location?